CAJ | 학술논문

为了明确不同螺口密度和为害始期福寿螺为害与水稻产量损失的关系，于2007—2009年分别在早稻、单季晚稻和连作晚稻田通过人工定量投放福寿螺进行为害损失试验。结果表明：投放的时间越早，危害损失越大；投放的数量越多，危害损失越重。所有这些损失率与福寿螺密度之间的关系，均可采用幂函数方程来描述，以5%产量损失作为经济允许水平计算，秧苗移栽后早稻田福寿螺密度宜控制在1只/m2以下，晚稻宜在3.5只/m2以下。福寿螺在早稻田的存活率在低密度下较高，而在晚稻田的存活率都不高，但是低密度下产卵量明显增多。建议要特别加强对水稻移栽后小苗期田间福寿螺的防控，最好能在移栽前对本田进行必要的防治，另外一旦断垄发生后要及时补苗，减少损失。
위료명학불동라구밀도화위해시기복수라위해여수도산량손실적관계，우2007—2009년분별재조도、단계만도화련작만도전통과인공정량투방복수라진행위해손실시험。결과표명：투방적시간월조，위해손실월대；투방적수량월다，위해손실월중。소유저사손실솔여복수라밀도지간적관계，균가채용멱함수방정래묘술，이5%산량손실작위경제윤허수평계산，앙묘이재후조도전복수라밀도의공제재1지/m2이하，만도의재3.5지/m2이하。복수라재조도전적존활솔재저밀도하교고，이재만도전적존활솔도불고，단시저밀도하산란량명현증다。건의요특별가강대수도이재후소묘기전간복수라적방공，최호능재이재전대본전진행필요적방치，령외일단단롱발생후요급시보묘，감소손실。
To investigate the relationship among rice yield loss, the golden apple snail (GAS) (Pomacea canaliculata Lamarck) density and damage beginning time, the GAS was added to early rice field, late hybrid rice field and single late rice field artificially from 2007 to 2009. The results showed that, the earlier GAS was added to field, the more damage GAS caused. It was also identified that the more GAS added to the field, the more damage GAS caused. The power function equations could be used to describe the relationship between GAS density and yield loss. There should be less than 1 per m2 in early rice and field or 3.5 per m2 in late rice field if the yield loss was expected blow 5%. In early rice field, lower density was beneficial for higher survival rate. Although the survival rate was low in late rice field, the oviposition capacity would be higher with low density. It was important to control GAS after rice transplant. And preventing GAS before rice transplant would be better. To reduce yield loss, rice seedling should be added in time if seedlingless ridges happened.